High-efficiency Fenton reaction device
By using independent mixing of hydrogen peroxide and ferrous solution and oblique cyclone reaction in the Fenton reaction device, the problems of low agent utilization and inconvenient catalyst maintenance are solved, and an efficient Fenton reaction is achieved.
Patent Information
- Application Number
- CN202422328920.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-09-24
AI Technical Summary
The existing Fenton reaction device has low agent utilization and inconvenient catalyst maintenance, resulting in low reaction efficiency.
After hydrogen peroxide and ferrous solution are mixed independently, they are mixed obliquely in the reaction delay container through a hedge mixer to form a cyclone reaction to generate catalytic iron oxide particles and improve the reaction efficiency.
The chemical utilization rate and catalytic efficiency of the Fenton reaction are improved, the occurrence of side reactions is reduced, and the difficulty of maintaining the catalyst is reduced.
Smart Images
Figure CN223175927U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of water treatment, and particularly relates to a high-efficiency Fenton reaction device. Background Technique
[0002] Fenton is a commonly used process in the sewage treatment process. It relies on ferrous ions to catalyze hydrogen peroxide to generate hydroxyl radicals under acidic conditions, and uses the strong oxidizing property of hydroxyl radicals to oxidize and destroy organic substances, so that the COD index in water can be significantly reduced. The problem faced by the Fenton process in general use is that a large amount of hydrogen peroxide and ferrous agents need to be used. Therefore, improving the reaction efficiency of the agents is an important direction for improving the Fenton reaction efficiency and improving the Fenton equipment.
[0003] Conventional Fenton is to add acid, ferrous, and hydrogen peroxide to water in sequence, and through aeration or mechanical stirring, ferrous and hydrogen peroxide react catalytically to generate hydroxyl radicals, and then an oxidation reaction occurs. Since ordinary mechanical stirring or aeration stirring can only play a dispersing role, the probability of ferrous ions contacting hydrogen peroxide and hydroxyl radicals contacting organic molecules only depends on their respective concentrations, and a higher concentration is required to increase the required reaction probability. In this way, side reactions will inevitably occur with other surrounding molecules, resulting in a relatively low utilization rate of the agents. There are also some devices that use catalytic fillers and other methods to promote the Fenton reaction, but the catalysts generally have a high price and there is a situation of fouling and caking, and the maintenance is not convenient. However, the existing high-efficiency Fenton reaction devices can be further improved in terms of the utilization rate of their agents and the convenience of catalyst maintenance. Therefore, we need a new type of Fenton reaction device to solve the above problems and meet people's needs. Content of the Utility Model
[0004] The purpose of the utility model is to provide a high-efficiency Fenton reaction device to solve the problem of its low agent utilization rate.
[0005] To achieve the above purpose, the utility model provides the following technical solution: A high-efficiency Fenton reaction device includes a water inlet and a water inlet pump. A acid adding mixer is provided on the outlet pipeline of the water inlet pump. A first pipeline and a second pipeline are provided on the outlet pipeline of the acid adding mixer. A ferrous mixer is provided on the first pipeline, and a hydrogen peroxide mixer is provided on the second pipeline. The outlets of the ferrous mixer and the hydrogen peroxide mixer are connected to a counterflush mixer through pipelines. A reaction delay container is provided outside the counterflush mixer. The counterflush mixer is located at the bottom of the reaction delay container, and a water outlet is provided at the upper part of the reaction delay container.
[0006] Preferably, the reaction delay container is one of a cylindrical tower and a square water tank.
[0007] Preferably, the outlet pipelines of the acid addition mixer are respectively connected to the hydrogen peroxide mixer and the ferrous mixer.
[0008] Preferably, an acid addition mixer is connected to the outlet pipeline of the water inlet pump.
[0009] Preferably, a reflux pump is provided outside the reaction delay container. The reflux pump serves as a bypass, taking water from the water outlet and transporting it to converge at the outlet of the water inlet pump.
[0010] Preferably, one side of the countercurrent reactor is a mixed hydrogen peroxide sewage pipeline, and the other side of the countercurrent reactor is provided with a mixed ferrous pipeline.
[0011] The technical effects and advantages of the present utility model: This kind of high-efficiency Fenton reaction device has a method in which hydrogen peroxide and ferrous sulfate are independently mixed with water first and then mixed with each other for reaction. When they are mixed with each other, the water flow directions face each other obliquely, forming many local swirls. In this flow state, hydrogen peroxide and ferrous can fully react, and it is beneficial to form iron oxide particles with a catalytic effect, improving the reaction efficiency of Fenton. Description of the Drawings
[0012] Figure 1 is a structural schematic diagram of the present utility model;
[0013] Figure 2 is a structural schematic diagram of the countercurrent mixer in the present utility model.
[0014] In the figure: 1 - reaction delay container, 2 - countercurrent mixer, 3 - hydrogen peroxide mixer, 4 - ferrous mixer, 5 - acid addition mixer, 6 - water inlet pump, 7 - reflux pump, 8 - water outlet, 9 - water inlet, 3-1 - mixed hydrogen peroxide sewage pipeline, 4-1 - mixed ferrous pipeline. Detailed Embodiments
[0015] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.
[0016] The present utility model provides as Figure 1 , Figure 2A highly efficient Fenton reaction device shown in the figure includes a water inlet and a water inlet pump 6. An acid adding mixer 5 is provided on the outlet pipeline of the water inlet pump 6. The outlet pipeline of the acid adding mixer 5 is provided with a first pipeline and a second pipeline. A ferrous mixer 4 is provided on the first pipeline, and a hydrogen peroxide mixer 3 is provided on the second pipeline. The outlets of the ferrous mixer 4 and the hydrogen peroxide mixer 3 are connected to a counterflush mixer 2 through pipelines. A reaction delay container 1 is provided outside the counterflush mixer 2. The counterflush mixer 2 is located at the bottom of the reaction delay container 1. An outlet 8 is provided at the upper part of the reaction delay container 1.
[0017] Specifically, the reaction delay container 1 is one of a cylindrical tower and a square water tank.
[0018] Specifically, the outlet pipelines of the acid adding mixer 5 are respectively connected to the hydrogen peroxide mixer 3 and the ferrous mixer 4.
[0019] Specifically, an acid adding mixer 5 is connected to the outlet pipeline of the water inlet pump 6.
[0020] Specifically, a reflux pump 7 is provided outside the reaction delay container 1. The reflux pump 7 is used as a bypass to take water from the outlet 8 and transport it to the outlet of the water inlet pump 6 for confluence.
[0021] Specifically, one side of the counterflush mixer 2 is a mixed hydrogen peroxide sewage pipeline 3-1, and the other side of the counterflush mixer 2 is provided with a mixed ferrous pipeline 4-1.
[0022] Working principle: The water inlet of the highly efficient Fenton reaction device is pumped or flows by gravity. First, acid is added in the acid adding mixer 5 to adjust to an appropriate pH value. Then the influent is divided into two paths and is respectively connected to the hydrogen peroxide mixer 3 and the ferrous mixer 4 through their respective pipelines. Hydrogen peroxide and ferrous solution are respectively mixed with the raw water in the hydrogen peroxide mixer 3 and the ferrous mixer 4. Then the raw water mixed with hydrogen peroxide and the raw water mixed with ferrous are strongly mixed in the counterflush mixer 2. The counterflush mixer is located inside the reaction delay container. The water outlet of the counterflush mixer enters the reaction delay container to continue the reaction for a period of time, and then enters the neutralization and precipitation process.
[0023] The form of the flusher can be that of two groups of multiple parallel thin tubes respectively mixing with each other at a fixed angle, or a cylindrical structure. Two water flows enter tangentially from opposite directions and flow in opposite directions, mixing inside the cylinder. The main direction of the water flow in the reaction delay container 1 is from bottom to top, and the total water outlet 8 is located at the upper part. Part of the outlet water can flow back and converge with the raw water inlet, and the convergence point is before the acid addition position. Partial backflow can ensure the flow rate and velocity inside the flusher when the flow rate of the incoming raw water is insufficient. The sewage to be treated is located at a low position and needs to be pressurized by the feed water pump 6. Then, an acid addition mixer is connected to the outlet pipe of the feed water pump 6, and acid is added to the mixer to reduce the pH of the inlet water, controlling the pH between 2 and 4.5. The outlet pipe of the acid addition mixer is divided into two paths, respectively connected to the hydrogen peroxide mixer 3 and the ferrous ion mixer 4. Two kinds of reagents, hydrogen peroxide and ferrous ion, are respectively added to their respective mixers and mixed with the sewage inlet water. The mixed sewage enters the countercurrent mixing device 2 inside the reaction delay container 1 through pipes respectively. The countercurrent mixing device 2 is as Figure 2 shown. The hydrogen peroxide sewage mixing pipe 3-1 and the ferrous ion mixing pipe 4-1 are arranged in parallel. Each of them branches out a group of parallel thin tubes. The thin tubes correspond to each other in pairs and converge towards each other at an angle of 30 degrees to 180 degrees. At the convergence point, hydrogen peroxide and ferrous ions come into strong contact and reaction, starting to oxidize COD. The outlet water of the countercurrent mixing device 2 rushes downward towards the bottom of the reaction delay container 1, then flows upward, and finally flows out from the top water outlet of the reaction delay container 1. During the time when the sewage stays in the reaction delay container 1, the unreacted hydrogen peroxide and ferrous ions continue to react until the reaction is complete. At the water outlet of the reaction delay container 1, part of the water passes through the reflux pump 7 and converges to the outlet of the feed water pump 6 to supplement the flow rate of the raw water. The other outlet water of the reaction delay container 1 completes the complete Fenton treatment process after neutralization and precipitation.
[0024] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent substitution on some of the technical features. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. An efficient Fenton reaction device, characterized in that: It includes a water inlet (9) and a water inlet pump (6). An acid adding mixer (5) is provided on the outlet pipeline of the water inlet pump (6). The outlet pipeline of the acid adding mixer (5) is provided with a first pipeline and a second pipeline. A ferrous iron mixer (4) is provided on the first pipeline, and a hydrogen peroxide mixer (3) is provided on the second pipeline. The outlets of the ferrous iron mixer (4) and the hydrogen peroxide mixer (3) are connected to a counterflush mixer (2) through pipelines. A reaction delay container (1) is provided outside the counterflush mixer (2). The counterflush mixer (2) is located at the bottom of the reaction delay container (1). A water outlet (8) is provided at the upper part of the reaction delay container (1).
2. The high-efficiency Fenton reaction device according to claim 1, characterized in that: The reaction delay container (1) is one of a cylindrical tower vessel and a square water tank.
3. The high-efficiency Fenton reaction device according to claim 1, wherein: The outlet pipelines of the acid adding mixer (5) are respectively connected to the hydrogen peroxide mixer (3) and the ferrous iron mixer (4).
4. An efficient Fenton reaction device according to claim 1, characterized in that: An acid adding mixer (5) is connected to the outlet pipeline of the water inlet pump (6).
5. An efficient Fenton reaction device according to claim 1, characterized in that: A reflux pump (7) is provided outside the reaction delay container (1). The reflux pump (7) serves as a bypass, taking water from the water outlet (8) and transporting it to the outlet of the water inlet pump (6) for confluence.
6. The high-efficiency Fenton reaction device according to claim 1, wherein: One side of the counterflush mixer (2) is a mixed hydrogen peroxide sewage pipeline (3-1), and the other side of the counterflush mixer (2) is provided with a mixed ferrous iron pipeline (4-1).